US Patent 7360330 Multi-purpose display frame with gravity lock

A multi-purpose, front-loading display frame includes a front frame member having a pair of opposite first and second lateral side sections, a rear frame member having a pair of opposite first and second lateral side sections, at least one hinge for pivotally joining the first lateral side section of the front member to the first side section of the rear frame member to permit pivotal movement between an open position, in which the second side sections of the front and rear frame members may be pivoted apart from one another, and a closed position, in which the second side sections are disposed closely adjacent to one another. A lock is mounted on one of the second side sections of one of the front and rear frame members, and at least one latch plate is engageable with the lock. The latch plate is mounted on the other of the second side sections of the other of the front and rear frame members for cooperative engagement with the lock. One of the lock and the latch plate is fixed and the other is generally vertically reciprocable so that, when the front frame member and the rear frame members are in the closed position, one of the lock and latch plate is reciprocably moveable relative to the other for movement between a normally locked and a release position, respectively.